Modular superflakers - Scotsman Ice Systems
Contents
1. The Evaporator a vertical stainless steel tube refrigerated and water filled In it there is a stainless steel auger and a water seal The Auger a stainless steel triple spiral auger it pushes the ice ribbon up to the top of the evaporator The Water Seal a two part face seal the top half rotating with the auger the bottom half stationary the sealing action being where the two seal faces meet The Breaker where the ice is compressed and much of the extra water is squeezed out of it before it reaches the ice spout The Thrust Bearing Top bearing as the ice is pushed up the evaporator the auger is thrust down and pressure from the auger thrust is taken up by this bearing Page 17 SECTION IV ADJUSTMENT AND REMOVAL AND REPLACEMENT PROCEDURES The procedures provided in this Section are arranged in alphabetical order to make specific Adjustment and Removal and replacement information easy to locate Read the instructions throughly before performing any Adjustment or Removal and Replacement Procedures 1 ADJUSTMENT OF THE BIN THERMOSTAT CONTROL The control for the Bin Thermostat is the Tempe rature Control located in the Control Box Assembly WARNING The adjusting screws on the Temperature Control device have very sensitive response to adjustment Over adjusting or erratic guessing can foul the instrument and cause ultimate delay and part replacement WHICH COULD HAVE BEEN PREVENTE2. SCOTSMAN SERVICE MANUAL MF 82 Modular superflakers TO BE USED JUST BY THE INSTALLER Page 3 TABLE OF Table of contents page CONTENTS Specifications 4 5 Section GENERAL INFORMATION AND INSTALLATION Introduction Description 6 6 Sealed refrigerant system 6 Storage bin or ice room 6 Unpacking and ilnspection 6 7 7 7 Location and levelling Electrical connection Water supply and drain connection Remote condenser and pre charged line 8 Final check list 9 Installation practice 10 11 Section 11 Pre start inspection Start up Section Ill PRINCIPLES OF OPERATION HOW IT WORKS ICE MAKER 14 Water 14 Ice 14 Refrigeration 14 ELECTRICAL REFRIGERATION 15 16 Section IV ADJUSTMENT REMOVAL amp REPLACEMENT PROCEDURES 17 18 19 20 21 Section V SERVICE DIAGNOSIS 22 23 Section VII MAINTENANCE AND CLEANING INSTRUCTIONS 27 28 Page 4 SPECIFICATIONS MF 82 AIR amp WATER COOLED MODEL gt gt ice making capacity WW Y ANI WIM Wii AIR COOLED MODELS Kg 2700 2500 2300 10 21 2100 32 38 1900 1700 ICE PRODUCED PER 24 HRS 1500 38 32 27 21 AMBIENT TEMPERATURE 15 10 5 C WATER TEMPERATURE Important operating requirements MINIMUM MAXIMUM Air temperature 10 C 50 F 38
3. which may be loosened in the water supply pipe at the time of installation In some cases a plumbing permit and services of a licensed plumber will be required CAUTION This ice maker is equipped with a low water pressure safety device which in the event of low water pressure will automatically stop the ice maker to prevent damage The ice maker will automatically restart with increased water pressure This ice maker will not operate properly when water supply temperatures are below 5 C 40 F and above 40 C 100 F B WATER COOLED MODELS On Water Cooled models a separate connection to the Condenser is required A 3 4 inch O D fitting is provided for a separate water inlet line to be connected and a separate drain line to be connected Page 8 NOTE The WARNING in the text above for the Air Cooled models equally applies for the Water Cooled models In both type installations water supply must be installed to conform with local plumbing codes In some cases a plumbing permit and services of a licensed plumber will be required DRAIN CONNECTIONS All drains gravity type and must be 1 4 inch per foot on horizontal runs The drains to be installed to conform with local code The drain receptacle should be an open trapped or vented construction Connect a drain line to 3 4 inch I D tube from the freezer drip pan and a separate drain line to 3 4 inch O D drain fitting from th
4. Freezer worm Expansion vaive tube ka Sight glass Heat exchanger 9 Compressor Condenser As it evaporates it absorbs heat from the evaporator and whatever is in contact with it such as the water inside it After the evaporator the refrigerant now a low pressure vapor goes through the heat exchanger and suction line back to compressor where the cycle is repeated ELECTRICAL REFRIGERATION The MF 82 Flakers are designed to operate at 400 Volts 50 Hertz threephase plus neutral Special voltage requirements are available on special order Therefore always CHECK NAMEPLATE for electrical information BEFORE proceeding with electrical wiring connections to the Icemaker Cold ambient temperatures and interruptions in water supply are conditions that can cause excessively hard ice and overloads within the Freezer Assembly which is directly trasmmitted to the Drivemotor and in turn will cause the intervention of Drive Motor Current limiter Spout Switch is mounted on the top of the Ice Spout and is actuated by the movement of the spring retained pressure plate The spout switch acts as a back up safety switch should the termostatic Control Bulb fail and cause ice to jam up in the ice spout The switch will shutoff the ice maker when actuated The Spout Switch can be manually tested by pressing upward the pressure plate
5. Less than one minute is about normal for bulb shut off function to cause the ice maker to stop Remember that unit will resume operation after 5 minutes that bin thermostat has closed its contacts NOTE When unit is on 5 minutes delay the light of unit switch glows signalling that unit is under power 9 There are no adjustments to make so replace the panels Page 13 10 Throughly explain the owner user the significant specifications of the ice maker the start up operation and attention to pay going through the procedures in the operating instructions Answer all questions about the ice maker by the owner and inform the owner of the name and telephone number of the authorized SCOTSMAN Service Agency serving him Water Failure Switch Reservoir Line Y Y Freezer L ii ff 9898919 9 919 9 91989 9191919 91919191919 9 Overflow Drain Water Valve Condenser Supply Water to Reservoir 3 4 g i Supply Water to Condensor 3 4 I lt 119 Drain from Condensor 4 7 gt Water drain from Reservoir ANN Water Valve Capillary Tube Page 14 SECTION Ill PRINCIPLES OF OPERATION How it Works ICEMAKER Water The water supply flows from the building source through the inline wate
6. removed by pulling out the bearing retainer from the bottom of freezer barrel You can heat the bearing retainer with a soft flame The bearing will drop out by itself 14 Remove screws and lockwashers which attach the Freezer Assembly to the Adaptor on the Gear box 15 Raise the Freezer Assembly off of the Adaptor to gain access to the Bearing Retainer then temporarily secure the Freezer Assembly out of the way to allow room to work 16 Unloose and remove the four screws that secure the bottom flange to the worm tube 17 Push out to remove the seal ring 18 Remove the clip ring and the bearing from the bearing retainer 19 Inspect the lower half of the Water Seal If reusable use care to protect it from dirt etc prior to replacement procedure 20 Inspect the lower Bearing and if the Bearing is dry replace it with a new one 21 Inspect the O ring of lower bearing retainer eventually replace it with a new one 22 Reach through the Adaptor and remove the Coupling for inspection 23 Check the Coupling for cracks chipping and excessive wear B To replace the Auger Water Seal Bearings and Coupling reverse the removal procedure NOTE 1 When installing the Bearing in the bearing retainer carefully tap a piece of wood positioned across the bearing to evenly seat the Bearing in the retainer 2 After assembling the ice breaker on the upper end of the Auger and BEFORE installi
7. wey _ 8 NO 45 2 1005 59 3 8 1 E 2 1 87 1085 4373 8 TI 1400015 3 4 579 26 3 8 WATER OUTLET WATER OUTLET WATER COOLED ONLY WATER INLET WATER COOLED ONLY WATER INLET CORD SET MIN SPACE FOR CONNECTION Dimensione MIN SPACE FOR PROPER VENTILATION GAS LINE CONNECTION HEIGHT 1300 mm 51 1 4 LIQUID LINE CONNECTION WIDTH 1073 mm 42 1 4 CORDSET REMOTE CONDENSER DEPTH 774 mm 30 1 2 MIN SPACE FOR CONNECTIONS NET WEIGHT 407 Kg MF 82 A 387 Kg MF 82 W MF 82 FLAKER MACHINE SPECIFICATIONS Model Cond unit Finish Compr HP 2 82 5 Air 2400 MF 82 WS Water 911986 Steel B 26500 Basic electr Amps Refr E ew Nr of wires Air Cooled 230 50 3 N il R 404 A eet 400 50 3 N 17 170 5 2 5 m m Water Cooled 230 50 3 N 400 50 3 N 14 RS 5 x 2 5 m m At 15 C 60 F water temperature Page 6 SECTION 1 GENERAL INFORMATION amp INSTALLATION INTRODUCTION This manual provides the specifications and the step by step procedures for the installation start up operation and maintenance and cleaning of the SCOTSMAN Model MF 82 Flaker The Model MF 82 is a quality designed engineered constructed and throughly tested icemaking system providing the utmost in flexibility to fit the needs of a particular user DESCRIPTION The Scotsman MF 82 continuous flow ice maker consists of one large capacity flak
8. INSTALLATION PRACTICE lt e 9 9 POWER LINE HAND DISCONNECT SWITCH CONTROL TIMER OPTIONAL WATER SUPPLY LINE HAND SHUT OFF VALVE WATER FILTER NOT SUPPLIED ta 4 1 New NS mi a 1 jJ A WATER INLET LINE W SEPARATE SHUT OFF VALVES WATER DRAIN LINE OPEN VENTED DRAIN Page 12 SECTION Il OPERATING INSTRUCTIONS PRE START INSPECTION 1 Make sure that the electrical power has been on for atleast 4 hours and that compressor crankcase is warm 2 From unit left side check to see through appropriate sight glass the oil level in gear box and also the oil level in compressor crankcase 3 Verify that drive motor current limiter LOVATO LASE located in control box on right side of contactor has the AMPs setting knob top red knob positioned on 0 4 the second red setting screw on two sec and the blue setting Screw on zero INHIBITION setting START UP Thefollowing procedure can only be started after pre start inspection has been properly completed 1 Open the water supply line shutoff valve Observe that water enters the water reservoir fills the tube from the reservoir to the evaporator and then shut off Check for leaks 2 Temporary set dial of delay timer to zero position 3 Press unit lighted switch to ON Unit will start operating Verify immediately if
9. There are other five safety controls in the machine and are The low Pressure Control an automatic reset adjustable control set to electrically open at 0 2 atm 3 psi to stop the entire ice maker prevents operation at vacuum refrigerant pressures The low water pressure Switch functions to discontinue the ice making process whenever incoming water pressure is reduced to below 0 8 atm 11 psi The switch will automatically restart the icemaking process when the water pressure is increased to 1 2 atm 16 psi The manual Reset High head Pressure Control is factory set to stop the entire icemaker should the head pressure reach 30 atm 435 psi on water cooled models and 34 atm 490 psi on air cooled models The Time Delay Device Timer with setting dial from 0 to 10 min It delays the energizing of main contactor in relation to its time setting preventing short cyclings of units motor compressor and drive motor It is factory set on 5 min delay so should power supply fail for an instant or should unit operation be interrupted by any safety control ice machine will resume operation again after 5 minutes Drive Motor Current Limiter It senses the intensity at the drive motor should this exceed its Amps set point 2 5 Amps for 400 V units and 5 0 Amps for 230 V ones cut off power for an instant sufficient to trigger the Time Delay Device Page 15 On water cooled models correct head pressure is 17 atm 240 psi Adju
10. ice maker cabinet Tape coil to prevent vibration againt another part Page 7 ELECTRICAL CONNECTION See machine electrical specifications in Unit Nameplate and at page 3 of this Service Manual to determine wire size to be used for electrical supply This unit must be grounded according to all Electrical Codes and local ordinances Provide a fuse disconnect box within sight and easy reach of the ice maker Use delayed action fuses on all terminals The maximum allowable voltage variations should not exceed ten percent of the nameplate rating even under starting conditions Low voltages can cause erratic operation and may be responsible for serious damages to the overload switch and motor winding WARNING The compressor is equipped with a crankcase heater which has to to energized even when the ice maker is switched off So make sure to connect the unit with the compressor crankcase heater constantly energized After long inoperative periods remember to give current to the heater 4 hours before the ice maker start up WATER SUPPLY AND DRAIN CONNECTIONS A AIR COOLED MODELS The recommen ded water supply line is a 3 4 inch O D fitting Connect to cold water supply line with standard plumbing fittings with a shutoff valve installed in an accessible place between the water supply and the Cabinet Awire mesh strainer is provided inside the fitting The strainer protects against large particles of rust scale etc
11. of it to the athmosphere more than a few minutes the Drier will absorb moisture from the atmosphere and loose substantial ability for moisture removal 2 Be sure the replacement Drier is installed with the arrow positioned in the direction of the refrigerant flow Page 19 10 REMOVAL OF EXPANSION VALVE A To remove the expansion valve 1 Remove screws and service panels 2 Close service valves on liquid line 3 Run the compressor for a moment until the evaporator coil has no liquid refrigerant in it 4 With the compressor idling equilize the pressure by cracking the liquid line service valve 5 Turn the suction service valve stem all the way in 6 Dry and clean the expansion valve accurately 7 Remove the liquid line and unbolt the valve 8 Seal immediately refrigerant openings B To replace the expansion valve reverse the removal procedures 11 REMOVAL AND REPLACEMENT OF THE WATER REGULATOR ASSEMBLY WATER COOLED MODELS A To remove the Water Regulator Assembly 1 Remove screws and the Service Panels 2 Bleed off or blow the refrigerant charge through the Schrader valve 3 Unsolder the Capillary line from the Water Regulator Assembly where connected at the process header 4 Disconnect the water inlet line at the rear of the Water Regulator 5 Disconnect the Condenser water inlet tube at the front of the Water Regulator 6 Remove two screws lockwashers and washers whi
12. sure that their corresponding light will glow NOTE Time delay timer must be mainteined set on 5 minutes This cause a delay of 5 at every start up WARNING Disconnect electrical power supply before removal procedure NOTE Before the next step move Master ON OFF switch OFF to stop the fan motors and ice makers 11 Inspectthe top bearing inthe ice breaker wipe clean of old grease and apply a coating of food grade grease SCOTSMAN P N 26361 0 or equivalent 12 Clean the air cooled condensers using a vacuum cleaner ahisk broom or brush The icemaking performance and capacity is affected by the clean condition of the air cooled condenser Instruct customer to clean frequently and to be sure icemaker and fan motor are OFF 13 Check that fan blades move freely are not touching any surfaces and are not bent or out of balance 14 Check for refrigerant leaks 15 Check for water leaks Pour water down drain line to be sure that drain line is open and clear 16 Check the quality of ice Ice should be slightly wet when formed but will cure rapidly to normal hardness in the bin 17 Check the bin thermostat control bulb hold ice on the control bulb of each system to test icemaker shut off NOTE The bin thermostat is factory se at 4 C differential and should keep the entire icemaker system shut off at least 10 minutes in high ambient temperatures longer in low ambients temperatu
13. the auger 7 Unloose and remove 8 screws that hold the ice breaker to freezer barrel Two longer screws are used with freezer side bracket 8 Insert two of these screws into two threaded blind holes which must have no bottom on barrel and by evenly drawing them down ice breaker is lifted up 9 Grasp the ice breaker and lift it up entirely Worm shaft witt remain into the freezer worm tube 10 With rowhide mallet or a piece of wood placed on the bottom end of the top bearing tap the bottom of the bearing to break it loose to be pulled out from ice breaker 11 Clean away old grease and replace the O rings in the ice breaker 12 Insert in auger hub threaded hole an eyebolt of 16 m m in order to offer sufficient and positive hook for pulling out the auger 13 Lift and pull out the auger with the help eventually of a small hydraulic Hoist NOTE 1 Any time the Auger is removed for replacement or for the inspection and replacement of the Bearing or Coupling use extra care in handling the Water Seal parts so no dirt or foreign matter are deposited on the surfaces of the Seal 2 If there is any doubt about the effectiveness of the Water Seal or O Ring REPLACE THEM A dirty worn or faulty Water Seal or O Ring will cause a leak and ultimately require a second time consuming removal and replacement procedure to be performed that COULD HAVE BEEN PREVENTED 3 Lower bearing or water seal should be
14. AEV Faulty compressor valve plate Float ball full of water Correct or move unit to cooled location Re charge with proper amount Adjust valve for correc refrigerant flow Repair or replace Replace Low ice production Loss of refrigerant under or overcharge of refrigerant Plugged condenser water tubes Low water level in the reservoir Overcharge of oil in system Check and recharge with proper amount of refrigerant Clean condensor Check float valve operation Check at oil sight glass Lower to 1 2 sight glass Gear box noise Low on lubricant Remove filling plug and add synthetic Oil Page 24 SECTION VI WIRING DIAGRAMS This section is provided as an aid in understanding the electrical circuit of the MF 82 Flaker The Wiring Diagrams in this Sections are Figure 6 1 Wiring diagram MF 82 WS andAS 14 400 50 3 N Figure 6 2 Functional Electric Diagram for MF 82 WS AS 14 WARNING When conducting a conti nuity check of the MF 82 Flaker 1 Disconnect the main power source 2 DO NOT use an incandescent lamp or jumper wire conduct all tests with a voltohm meter Page 25 F G 6 1 WIRING DIAGRAM MF 82 400 50 3 N THIS UNIT IS SHOWN IN NORMAL ICE MAKING MODE UPPER FAN MOTOR LOVER FAN MOTOR STARTING TIMER ON SPOUT SVITCH COUT QUT BIN CONTROL d ICE LEVEL CONTROL COUT OU
15. ALL YOUR AUTHORIZED SCOTSMAN SERVICE AGENCY 1 Check and clean optional water line strainers or water purification system 2 Remove screws and top and front panel 3 Remove cover from water reservoir and depress the float to ensure that a full stream of water enters each reservoir 4 Check that the icemaker cabinet is level in side to side and front to rear directions 5 Check that the water level in water reservoir is below the overflow and is level to correspond 20 m m below the ice discharge opening 6 Clean water reservoir and interior of the freezer assembly using asolution of SCOTSMAN Ice Machine Cleaner Refer to CLEANING Icemaker NOTE Cleaning requirements vary according to local water conditions and individual user operation Visual inspection of the auger before and after cleaning will indicate frequency and procedure to be followed in local areas 7 When doubtful about refrigerant charge install refrigerant gauges on Service valves and check gauge for compressor head and check gauge for compressor head pressure See Nameplate for refrigerant charge specifications 8 Check gauge for suction line pressure will be 1 9 Bar 27 Psig 9 Check drive motor operation Normal operating temperatures about 70 which is hotto touch Check with Ammeter amps drawn and make sure they are in the limits of Drive motor windings 10 Check setting and function of all the pressure controls also make
16. AUSE SUGGESTED CORRECTION 2nd Warning Light glows intermittently Lo refrigerant press Incorrect refrigerant suction pressure Moisture in system Overcharge of oil in system Not enough refrigerant No water in float reservoir Add Refrigerant to raise suction pressure Raise head press control setting Purge change drier Dehidratate amp recharge the system Check for refrigerant leak and re charge correctly Check for water inlet through float ball or for water waste 3rd Warning Light glows intermittently Lo water pressure Intermittent water supply or too low water pressure Water shut off valve closed Check and clean water strainer The unit does not make ice Drive coupling worn or splitted Gear in gear box stripped Water not entering freezer assy Unloose and pull ont gear box and change coupling Check and replace Check water line from reservoir to freezer 151 Red Light glows Hi pressure excessive Hi pressure control cut off unit operation Blown fuse Check cooling water at condenser Condenser tube clogged up Water regulating valve to be re adjusted Fan motor out of operations Dirty condenser Replace fuse and check for cause of blow fuse Green Light is off Unit will not run Loose electrical connection Switch in OFF position Inoperative master switch Spout switch cut out Check wiring Turn switch to ON Replac
17. C 100 F Water temperature 5 C 40 F 38 C 100 F Water pressures 1 5 atm 20 105 gauge Electrical voltage variation voltage rating specified on nameplate 10 10 Extended periods of operation exceeding these limitations constitutes misuse under the terms of Scotsman Manufacturer s Limited Warranty resulting in a loss of warranty coverage We reserve the right to make product improvement at any time Specifications and design are subject to change without notice WATER COOLED MODELS Kg 2700 2500 2300 2100 1900 1700 ICE PRODUCED PER 24 HRS AMBIENT TEMPERATURE 1500 38 32 27 21 15 10 5 C WATER TEMPERATURE NOTE Daily ice capacity is directly related to condenser air and water inlet temperature water temperature to make ice and age of machine To keep your MF 82 performing at its maximum capacity it is necessary to perform periodic maintenance as outlined on page 27 of this manual Page 5 9 6 9 8 lt 1 89 gt 9 9 0 SPECIFICATIONS CONT D a 01 zu a ri 8 THEM lt a Lad 1 3 49 1 078 42 vd Lu 926 52 2 Tus a 9 38 1 8 __ REMOTE CONDENSER ee TS 2403 Optional 8 T Vi lt G 6 525
18. D Factory settings is 1 5 C cut out and 4 C cut in 2 ADJUSTMENT OF THE LEG LEVELERS When the MF 82 Flaker is installed with the Leg Levelers the Cabinet must be leveled in the front to rear and side to side directions This adjustment should be performed during initial installation of the Cabinet and anytime the Cabinet is moved from the original location to another site A using an open end wrench and a carpenter s bubble level rotate the threaded Leveler in each Leg to RAISE or LOWER the Cabinet is level in the front to rear direction B Repeat step A for leveling in the side to side direction C Recheck boththe front to rear andthe side to side levelling and repeat adjustments as necessary 3 ADJUSTMENT OF THE WATER REGULATOR ASSEMBLY The correct head pressure on MF 82 Flakers is 17 atm 240 Psi Adjustments can be performed onthe Water Regulator Assembly to increase or decrease the head pressure To Adjust the Water Regulator Assembly A To INCREASE the Head Pressure Rotate the adjusting Screw on the Water Regulator Assembly IN or CLOCKWISE B ToDECREASE the Head Pressure Rotate the adjusting Screw on the Water Regulator Assembly OUT or COUNTERCLOCKWISE 4 ADJUSTMENT OF THE WATER LEVEL INTO THE FREEZER CHAMBER The correct Water Level in the Freezer Chamber is about 2 cm 3 4 inch below the ice discharge opening Low Water Level causes excessive strain inside the Freezer Assem
19. Ice Machine Cleaner with 10 liters warm water 6 Slowly pour the cleaning solution into water reservoir until it is full Wait 15 minutes 7 Move master ON OFF switch to ON position and after 5 minutes of delay as the ice maker begins to use water from the reservoir continue to add more cleaning solution to maintain full reservoir if any has remained 8 Continue icemaking clearing ice from the spout until the water reservoir is empty DO NOT allow the icemaker to operate with empty reservoir 9 Move master ON OFF switch to OFF 10 Flush out the remaining cleaning solution from freezer as per step 4 Wash and rinse the water reservoir 11 Remove the block from the float in the water reservoir and allow new fresh water to fill up the freezer Move the master ON OFF switch to ON position 12 Continue icemaking for at least 15 minutes to eliminate any remanentofthe cleaning solution Check ice for acid taste continue icemaking until ice tastes sweet CAUTION DO NOT use ice produced from the cleaning solution Be sure none remains in the bin
20. OLED CONDENSER CAUTION To prevent electrical schock or damage to equipment when the cover is removed ensure that power supply is switched off A reverse acting automatic reset high pressure control fitted under the control box is electrically connected to the condenser fan motor and by a capillary tube to the liquid line Its function is to maintain the head pressure at 17 bar 240 Psi with a fixed differential range of 1 bar 14 Psi To adjust the condensing pressure turn the grooved adjusting stem by the special adjusting key P n 00102300 clockwise to dicrease or Counter clockwise to increase the setting point 1 Range adjustment screw 2 Differential adjustment screw 3 Range indicator 4 Differential indicator NOTE Always install a replacement Drier anytime the Sealed Refrigeration System is opened Do not replace the Drier until all other repairs or replacements have been completed The liquid refrigerant must be removed from the condenser and the pressure in the condenser must be adjusted to atmospheric pressure To remove the condenser 1 Remove screws and the front panel and the left side and right side panels 2 Bleed off or blow the refrigerant charge through the service valve after closing compressor service valves isolate the condenser 3 Unsolder the refrigerant inlet and outlet lines from the condenser 4 Close off water circuit discon
21. T LO H20 PRESS CONTROL 8 VATER PRESS TOO LOW TIMER DELAY TEMPOR ALTAR MI PRESS CONTROL 5 EXCEBSIYE HI PRESSURE 40 PRESS CONTROL 8 SUCTION PRESS TOO LOV COMPR PROTECTOR CUT OUT SPOUT SWITCH FOR COMPRESSOR ELECTRIC CONNECTIONS REFER TO COMPRESSOR WIRING DIAGRAM IN COMPRESSOR TERMINAL BOX JU8 FOR AIR COOLED UNIT CONNECTION REPLACES NEUTRAL FOR MODEL 220 50 60 3 Page 26 MF 82 FUNCTIONAL ELECTRIC DIAGRAM CONTACTOR 2 3 m o uw n m e z x lt THERhISTORS CONTROL gt x PRESBURE CONTROLS 2 5 5 2 am a c PRESS CONTROL SNINVYA LO PRESB CONTROL NO 5 1 15 SPOUT SWITCH 1102 019 1 09 HOLEAS 3 PROTEC SVITCH F G 6 2 Page 27 SECTION VII MAINTENANCE amp CLEANING INSTRUCTIONS GENERAL The periods and procedures for maintenance and cleaning are given as guides and are not to be construed as absolute or invariable Cleaning especially will vary depending upon local water conditions and the ice volume produced and each icemaker must be maintained individually in accordance with its own particular location requirements ICEMAKER THE FOLLOWING MAINTENANC E SHOULD BE SCHEDULED AT LEAST TWO TIMES PER YEAR ON THIS ICEMAKER C
22. auger drive motor turns the auger coupling in counterclockwise directions WARNING The evaporator auger drive motor is threephase so at the unit start up care must be taken to ensure of the correct rotation direction of auger In case of wrong rotation interchange the phases by interchanging the lead wire connections of main cord AUGER MUST TURN COUNTER CLOCKWISE 4 f auger drive motor is rotating correctly move the timer delay to 5 minutes position Unit must be on delay control set on 5 min and will always resume operation when 5 min delay is elapsed 5 Aftertwo orthree minutes of unit operation observe that flaked ice begins to drop out in the ice spout In the evant that the drive motor current limiter will cut out unit operation DO NOT BE ALARMED Unit will automatically resume operation after 5 minutes 6 Letthesystem operate for about 30 minutes Check for any excess noises beyond normal compressor noise a Fan noises when Air Cooled blades touch other surfaces blades bent out of balance b Vibrating type from touching lines C Chattering lack of water in Freezer d Compressor loose at one or more hold down bolts 7 If desired the low side pressure can be checked it should be 1 9 atm 27 psi Checkto see through liquid sight glass for correct refrigerant flow and charge 8 Holdahandful of ice around the ice storage bin thermostatic control bulb to test shut off
23. be used Chain falls can be hooker up to the machine for upper corners holes provided for this sort of operation 2 Position the MF 82 inthe selected permanent location and level the cabinet on both the left to right anf front to rear direction 3 Ice chute extension or ice deflector if not pre set must be arranged to convey the ice from the outlet of the machine to the ice storage area Stainless steel is an excellent material where its cost is not prohibitive Angles or edges of less than 45 should not be used Ice will cling to the surface and either melt excessively or jam in the ice chute The sharper the drop the better If straight down do notinsulate unless necessary Ice chute and or ice deflector end whenever possible should be preset with grommeted holes so that bin thermostat capillary tube can be inserted in them to be correctly positioned 4 Thermostat capillary tube must be positio ned so that its end extends out the ice chute opening or the ice deflector and get easily in contact with the cone formed by the ice deposited in the storage room before anyway that ice builds up in the chute Thermostat capillary tube is coiled behind the control box it must be routed to follow the ice chute or ice deflector and protrude for a certain extension beyond the ice discharge opening in the storage room Use caution when routing this capillary to prevent kink or to bent it excessively Coil excess capillary inside
24. bly due to a faster freezing rate When the Water Level is above or below the correct level adjustment can be performed to RAISE or LOWER the Water Level by raising or lowering the Water Reservoir and its Mounting Brackets A To RAISE the Water Level loosen and remove the two screws which attach the Mounting Bracket of the Water Reservoir to the frame and raise the Water Reservoir Assembly of the desired amount then thread the screws in the corresponding holes and tighten B To LOWER the water Level loosen and remove the two screws which attach the Mounting Bracket of the Water Reservoir to the frame and lower the Water Reservoir Assembly of the desired amount then thread the screws in the corresponding holes and tighten WARNING Be sure the electrical power supply and the water supply are OFF before starting any of the following REMOVAL REPLACEMENT procedures as a precaution to prevent possible personal injury or damage to equipment 5 ADJUSTMENT OF THE AUTOMATIC EXPANSION VALVE This valve may be manually regulated by means of the adjusting stem Turning the adjustment to the left counter clockwise will increase the rate if refrigerant flow Turning the adjustment to the right clockwise the refrigerant flow to the evaporator is reduced Use hex head wrench for manual adjusting operations Page 18 6 ADJUSTMENT OF FAN MOTOR PRESSURE CONTROL REMOVAL AND REPLACEMENT OF THE WATER CO
25. board placed into the control box following the wires color fitted on the same D Pre charged refrigerant lines 1 set of pre charged refrigerant lines consists of a 3 8 inch inside diameter self sealing liquid line and a 3 4 inch inside diameter self sealing discharge line 2 When possible route the maximum length ofthe pre charged refrigerantlines in the building with the minimum lenght outside to prevent vandalism and to minimize the condenser effect that exposed lines can produce in cold weather Insulate lines that with be exposed to outside temperatures that will be below freezing for extended periods of time CAUTION 1 Each coupling on the precharged refrigerant lines is self sealing and should be tightened 1 4 turn more than snug tight ALWAYS USE TWO WRENCHES WHEN TIGHTENING THESE FITTINGS ONE AS BACKUP WRENCH TO PREVENT TWISTING OF TUBING AND POSSIBLE KINKING OR LINE RUPTURE 3 Connect the 3 8 inch diameter refrigerant line coupling to the remote condenser refrigerant fitting and to the refrigerant fitting on the right side of the Icemaker chassis 4 Connect the 3 4 inch diameter refrigerant line coupling to the remote condenser refrigerant fitting and to the refrigerant fitting on the right side of the Icemaker chassis E Excesslength of pre charged refrigerant lines atinstallations where the Icemaker chassis to remote condenser refrigerant line path is substantially less
26. ch attach the Water Regulator Assembly bracket to the Chassis base and remove the Water Regulator Assembly and bracket NOTE Thoroughly evacuate the System to remove moisture and non condensables 1 Remove the factory seals from the replacement drier and install the drier in the refrigerant lines with the arrow positioned in the direction of the refrigerant flow 2 Install the drier brace on the drier 3 Tighten the flare nuts to both drier fittings to connect the refrigerant lines 4 Purge the system and check for leaks 5 Throughly evacuate the system to remove moisture and non condensables 6 Charge the system with refrigerant by weight SEE NAMEPLATE 7 Re mount all Service Panels B the Water Regulator Assembly reverse the removal procedure 12 REMOVAL AND REPLACEMENT OF THE AUGER WATER SEAL BEARINGS AND COUPLING A To Remove the Auger Water Seal Bearings and Coupling 1 Remove screws and the Front Panel and the Top Panel Shut close water supply Drain the water reservoir and freezer assy using the drain tube attached to the freezer water inlet Page 20 2 Remove the two screws that secure the spout to the stop of the Freezer Assembly 3 Disconnect wires from micro box spout switch 4 Remove micro box and the spout assy 5 Remove center plastic cap that protects top bearing 6 Unloose and remove center bolt that secures the ice breaker to
27. e Water Cooled Condenser on Water Cooled models REMOTE CONDENSER AND PRECHARGED REFRIGERANT LINES INSTALLATION A Location considerations 1 Limited to 6 metres the length of precharged refrigerant line from the left side of the icemaker to the remote condenser 2 Maximum vertical rise of 3 metres between the icemaker and the remote condenser 3 Best available location protected from the extremes of dirt dust rain sun ans winds B Unpacking and inspection 1 Visually inspect the exterior of the shipping container and any severe damage noted ahould be reported to delivering carrier and a concealed damage claim filled subjectto internal inspection with carrier representative present 2 Uncrate the remote condenser and precharged refrigerant linea and inspect for any concealed damage Notify carrier of any concealed damage claims as stated in step 1 above 3 Check that the pre charged refrigerant li nea are intact not kinked and that there is no sealed puncture or loss of refrigerant C Remote condenser wall attachment 1 Install and attach the remote condenser to the wall of the building using the methods and practices of builting standards that conforms to and meets the local building code requirements in your area 2 Remove control box cover from remote condenser and connect the electrical power line coming from the unit to the wires of the fan motor by means of the connecting terminal
28. e ice making system contained within a compact cabinet which can be in enamel finish or entirely in stainless steel The flake ice produced is extruded through an ice discharge opening provided in the rear side of the unit If the unit location requires it the ice spout can be positioned as well to discharge the ice out through a second opening provided in the left side of the cabinet All panels are removable to allow easy access to electrical and mechanical components for cleaning and maintenance SEALED REFRIGERANT SYSTEM To provide quite efficient operation of the ice maker the compressor is mounted on rubber grommets The water cooled models have a tube within a tube condenser with water regulating valve for correct condensing water flow The air cooled model has a built in condenser with four fan motors controlled by two pressure controls The freezer auger is driven by a gear motor assy The refrigerant used is R 404 A controlled by an automatic expansion valve On request the MF 82 cal also be supplied with remote condenser and copper refrigerant lines STORAGE BIN OR ICE ROOM Since the MF 82 is a continuous flow type ice maker and does not have its own attached storage bin itis necessary to use an auxiliary bin or prefabricated ice room for appropriate ice storage An insulated ice storage bin or room is always required then according to ice applications this can be refrigerated or non refrigerated a weight vo
29. e switch Check ice chute arrangement Page 23 SYMPTON POSSIBLE CAUSE SUGGESTED CORRECTION Unit run intermittently Start and stop 5th Warning light glows Auger rubbing in freezer barrell Freezer barrell scored Auger bearing seized Gear box seized No lubricant Freeze up Drive motor running on reverse Remove auger to check situation smooth freezer barrel and auger spiral with send paper or replace them Replace bearing Add lubricant or replace gear box Melt ice in freezer and remove ice breaker and auger to check cause of freezer up Interchange connection wires Excessive noise Gear reducer loose on frame Drive motor end play or worn bearings Motor compressor not floating on rubber cushions Water level in evaporator too low Tighten Repair or replace Loosen hold down bolts Set water level correctly Water leaks Damaged water seal Gravity feed line leaking Water level in reservoir too high Replace seal Check hose clamp Adjust water level Compressor cycles intermittently 6th Warning light glows Low voltage Dirty Condenser Water regulating valve too close AEV valve closed Non condensable gases in system Check for overloading Clean condenser Open water valve Adjust Purge off Making wet ice Surrounging air temperature above 40 C 100 F Under or over charge of refrigerant Closed
30. ect the electrical leads at the Compressor Junction Box that originate in the Control Box 4 Close both suction and discharge Service Valves Bleed off or blow the refrigerant in compressor through the Service Valves WARNING Removal of compressor because of its weight could present a problem Carts small Hydraulic Hoists etc must be made available to move the compressor 5 Unbolt the suction service and discharge service valves from the compressor DO NOT REMOVE THE LINES FROM THE VALVES 6 Immediately plug all the openings through which refrigerant flows using dry rubber cork stoppers or tape 7 Disconnect the compressor base bolts that hold the compressor to the base 8 Plug compressor refrigerant opening to prevent oil from spilling out during compressor removal if this one is tilted 9 Slide the compressor out from unitchassis from the rear side B To replace the compressor assy reverse the removal procedures 9 REMOVAL AND REPLACEMENT OF THE DRIER A To remove the Drier 1 Remove screws and all service panels 2 Remove screws and Drier brace attaching the drier to the Chassis 3 Bleed off or blow the refrigerant charge through the service valve 4 Unloose the refrigeration lines flare nuts at each end of Drier remove the Drier and separate drier from the drier brace A To replace the Drier CAUTION 1 If the factory seal is broken on the replacement drier exposition
31. lume ratio of 1 8 m per ton must be taken into consideration for correct ice storage room design which in any case should be dimensioned to accomodate a minimum of 16 hrs ice production UNPACKING AND INSPECTION 1 Call your authorized SCOTSMAN Distributor or Dealer for proper installation 2 Visually inspect the exterior of the shipping container and skid and any severe damage noted should be reported to the delivering carrier and aconcealed damage claim filled in subjetct to internal inspection with carrier representative present 3 Remove the packing and remove the shipping bolts and the shipping base or skid 4 When necessary install the leg levelers in the cabinet base sockets then raise the cabinet to the upright position 5 Remove screws and shipping tape and all doors and service panels from the cabinet and inspect for any concealed damage Notify carrier of any concealed damage claims as stated in step 2 above 6 Remove all internal support packing tape and wires in machinery compartment 7 Check that refrigerant lines do not rub or touch lines or other surfaces and that fan blades if any move freely 8 Check that the Compressor is snug on all mounting pads 9 Use clean damp cloth or disposable paper wiper to pipe clean the exterior surfaces of the cabinets 10 See DATAPLATE on the cabinet base and check that the location source voltage cor responds with the voltage specified on
32. nect the water inlet and outlet lines from the condenser and drain as much water as possible from the condenser 5 Remove bolts lockwashers and washers which secure the condenser to the chassis mounting base 6 Remove the condenser from the cabinet NOTE Thoroughly evacuate the System to remove moisture and non condensables NOTE A These are general steps to be followed at first when removing any part of any refrigeration system which are in summary a Store the refrigerant charge in compressor crankcase b Remove all refrigerant from part to be opened c Balance pressures in parts just evacuated d Isolate parts to be opened from the rest of the system e Clean and dry joints to be broken f All refrigerant openings should be immediately plugged as soon as they are opened g Upon reassembling it is necessary to remove all the air moisture from the lines and B To replace the Condenser reverse the removal procedure 8 REMOVALANDREPLACEMENT OF THE COMPRESSOR ASSEMBLY NOTE Always install a replacement Drier anytime the sealed Refrigeration System is opened Do not replace the Drier until all other repairs or replacements have been completed whatever part that has been open to A Toremove the Compressor Assembly 1 Remote screw and Right Front Rear and Left Panels 2 Remove two screw and the Cover from the Compressor Junction Box 3 Disconn
33. ng the Cap apply an ample coating of vary bond grease type Never Seez food grade H1 certified 20 C 150 C Grease P N26361200 tothe upper partof the Bearing the Cap Screw and Washer Then install the Cap in place 13 REMOVAL AND REPLACEMENT OF THE FREEZER ASSEMBLY NOTE 1 The Cabinet may have to be removed from is permanents location especially if located in a corner in order to have access to the left side and rear of the Chassis 2 In addition to shutting OFF electrical power and inlet water to the icemaker be sure to disconnect the inlet water line BEFORE moving the icemaker from the permanent location 3 Always install a replacement Drier anytime the sealed refrigeration system is opened Do not replace the Drier until all other repair or replacement has been completed A To Remove the Freezer Assembly 1 Remove screws and left and right side rear panels 2 Refer to procedure IV 12 and remove the Spout Assembly Ice Breaker and Auger 3 Remove Corbin clamp and Tygon tube from the Freezer Assembly that connects to the Water Reservoir Assembly 4 Perform operation at steps 2 3 4 5 at procedure IV 10 5 Disconnect suction line joint from the freezer 6 Unsolder the refrigerant inlet line at the freezer 7 Remove screws that secure bracket of freezer to the left side of chassis 8 Remove screws lock washers and washers which attach the bottom of the Freezer A
34. r been instructed on how to operate the Icemaker 8 Has the Manufacturer s registration Card been properly filled out Check for correct Model and serial numbers from Serial nameplate then mailthe completed card to the FRIMONT factory 9 Checkallrefrigerant linea and conduitlines to guard against vibration or rubbing and possible failure 10 Isthere atlast 20 cm clearance behind and around Cabinet for proper air circulation 11 Isthe Icemaker installed indoor in a location where ambient temperatures are a Minimum of 10 C 50 degrees F all year around 12 Has water supply pressure been checked to insure a minimum of 1 atm 14 Psi 13 Is the remote condenser installed per local building codes and in a place where it has adequate ventilation and minimal solar heat gain 14 Verify that unit lighted switch is in the OFF position 15 Switchthe main disconnect switch on power line inthe ON position to energize the compressor crankcase heater well in advance the start up 16 Verify that dial of delay timer in control box is set on 5 minutes 17 Has the owner been given name and telephone number of the authorized SCOTSMAN Service Agency Page 10 INSTALLATION PRACTICE O WWWWWWWWW A A 1 HAND DISCONNECT SWITCH WATER INLET 3 WATER INLET WATER COOLED ONLY 2 WATER OUTLET WATER COOLED ONLY 8 WATER OUTLET 6 OPEN VENTED DRAIN Page 11
35. r strainer enters at the Cabinet fitting and on to the Water Reservoir The water Reservoir functions to maintain a constant water level inside the Freezer Assembly Water from the Water Reservoir enters at the bottom of the freezer Assembly and is changed into ice by low temperatures inside the freezer Ice A stainless steel Auger within the Freezer is powered by a separate drive motor through a speed reducer and the rotating Auger carriers the ice upward to the Ice Breaker assy where excess water is pressed out of the ice as it is extruded or flaked out through the Ice breaker The flake ice into spout in diverted out through the ice discharge opening Moving the manual ON OFF toggle switch to the ON position starts after 5 minutes the automatic and continuous icemaking process When the Ice touches the Thermostatic Control Bulb the sensing bulb shuts off the icemaking process Refrigeration Beginning at the compressor the refrigerant R 404 A is compressed into a high temperature gas The discharge line directs this gas to the condenser At the condenser air or water cooled the gas is cooled by either air or water and it then condenses into liquid This high pressure liquid then goes through the liquid line to the expansion valve The expansion valve meters liquid refrigerantinto the evaporator At the evaporator the refrigerant enters an area of relatively low pressure where it can easily boil off or evaporate
36. re during normal operation Settings are 1 5 C CUT OUT and 4 CUT IN 18 Make sure that water lines in water cooled condenser are free from any excess of water minerals otherwise arrange to clean the tube with a power driven wire brush or running through it a weak acid solution made with 20 percent of Hydrocloridic acid Page 28 19 Check compressor oil level through sight glass Stop unit operation and after 10 see that oil level is 2 3 m m above center line of sight glass 20 Check gear box oil level through its sight glass every 6 months Oil must be replaced every 3 years Use mineral oil ESSO SPARTAN 52 a similar one with a viscosity of 32 cst at 40 C CLEANING 1 Remove screws and the top left and front panel 2 Move master ON OFF toggle switch to OFF position 3 Remove reservoir cover and block the float in water reservoir 4 Drain the water reservoir and freezer assembly using the drain tube attached to the freezer water inlet Return the drain tube to its normal upright position and replace the end cap WARNING SCOTSMAN Ice Machine Cleaner contains Phosphoric and Hydroxyacetic acids These compounds are corrosive and may cause burns If swallowed DO NOT induce vomiting Give large amounts of water or milk Call Physician immediately In case of external contact flush with water KEEP OUT OF THE REACH OF CHILDREN 5 Prepare cleaning solution Mix two liters of SCOTSMAN
37. sconnect wire leads to motor 3 Remove four hex head bolts lockwashers and washer which attach the motor to the gear reducer 4 Remove the drive motor out of the gear reducer B To replace the drive Motor reverse the removal procedure 16 REMOVAL AND REPLACEMENT OF GEAR BOX A Remove screws and all service panels 1 Followthe procedure at step 15 to remove the drive motor 2 Remove four nuts and washers which hold the gear box adaptor to the evaporator assembly 3 Unloose and remove screws securing upper evaporator bracket to left side chassis 4 With a small hydraulic Hoist raise the evaporator assembly to facilitate removal of entire gear box 5 Unloose and remove four nuts holding the gear box to unit base The gear box is now loose and can be removed Do not tilt to avoid oil spillage B To remount Gear Box assembly reverse the removal procedure taking care to position correctly the output shaft with its keys well in shape Page 22 The Service Diagnosis Sections is for use in aiding the servicemen in diagnosing a particular problem for pin point the area in which the problems lies thus an ever available reference for proper corrective action SECTION V SERVICE DIAGNOSIS system 1 ICE MAKING REFRIGERATION SYSTEM The following chartlists corrective actions for the causes of known symptoms of certain problems that can occur in the ice makingrefrigeration SYMPTON POSSIBLE C
38. ssembly to the Adaptor on the Gear box 9 Lift the Freezer Assembly up and off of the Adaptor of Gear box NOTE Throughly evacuate the System to remove moisture and non condensables B Toreplace the Freezer Assembly reverse the removal procedure 14 REMOVAL AND REPLACEMENT OF THE WATER RESERVOIR ASSEMBLY A To remove the Water Reservoir Assembly 1 Remove screws and the left Panel and the Top Panel Close the Water Supply Drain water reservoir and freezer assy Using the drain tube attached to the freezer water inlet NOTE Be prepared with container or rags to catch water left in lines when lines are disconnected in next steps to prevent draining water on parts components electrical lines etc 2 Disconnect the water inlet tube from the Water Reservoir Assembly 3 Remove two corbin clamps and two tubes from the bottom of the water reservoir assy and damp all water in them by bending them down in a pail Page 21 4 Unscrew and remove the screws that secure the water reservoir bracket 5 Remove the Water Reservoir Assembly from the mounting bracket B To replace the Water Reservoir Assembly reverse the removal procedure NOTE Check that the installed replacement Water Reservoir Assembly float moves freely 15 REMOVAL AND REPLACEMENT OF THE DRIVE MOTOR A To remove the drive motor assembly 1 Remove screws and front and left side panels 2 Di
39. stments can be made on the Water regulation Valve Air cooled models MF 82 are equipped with two upper and lower fan motors Both pair of motors are controlled by individual high pressure controls that are connected to the systems high side The left fan control with not operate until high side pressure reach 16 5 atm 230 psi The right fan control will not operate until pressure reach 17 atm 240 psi This way in colder ambients only the upper fan motors operate In higher ambients the lower fans will cycle on off In extremely high ambients all four fan motors ope rate Suction pressure should be 1 9 atm 27 psi with proper refrigerant charge When charging the system with refrigerant on water cooled models set the compressor head pressure at 17 atm 240 psi and charge with refrigerant so that the frost line extends out of the compressor at least eight inches after 15 minutes operation for best capacity and performance MF 82 REFRIGERANT CHARGE MODEL Air cooled R 404A 4650 gr approx Water cooled R 404A 2200 gr approx CONTROL CONSOLE Located on the front panel is a virtual control console that monitors unit performance auto matically Any interruption or significant reduction in water or electrical supplies causes an instant stop to the operation of the modular flaker At the same time a warning light yellow or red is activated on the control console telling the user of the ice makers stoppage and also the reason
40. the dateplate CAUTION Unproper voltage supplied to the ice Maker will void your parts replacement program 11 Remove the Manufacturer s Registration Card from the User Manual and fill in all spaces including Model Number and Serial Number taken from the aluminium plate Forward the completed self addressed registration card to the Frimont Factory LOCATION AND LEVELLING WARNING This unit must be installed in an area where it will not freeze and protected from the elements such as wind rain water spray or drip Ambient tempe rature limitations are 10 C 50 F minimum and 38 C 100 F maximum while water temperature limitation are 5 C 40 F minimum and 38 C 100 F maximum Ambient and water temperature exceeding these limitations may result in machine malfunction and the loss of warranty coverage Make sure that the structure on which the ice maker will be located be on a solid footing and supports at least 1000 Kgs This ice maker is designed for free standing application only Do not built it in Make sure that location site is well ventilated to ensure correct operation of air cooled models that have the condenser directly behind the front panel Also allow 20 cm clearence in back and both side of the ice maker to be able to easily perform service inspections and operations 1 Erection For elevation of machine to its stand or location chain falls or fork lifttrucks should
41. then the length of pre charged refrigerant lines to be installed route and dress the excess refrigerant line as follows 1 Follow straight line routing when possible 2 Retain excess pre charged refrigerant line inside the building 3 Spiralthe excess length of the precharged refrigerant line in the best selected inside location and in a manner that prevents refrigerant trapping EXCESS REFRIGERANT LINES COILED FOR VERTICAL DRAIN LOCATED WITHIN BUILDING EXCESS LINE Sy VERTICAL SPIRAL WITH CONSTANT INCLINED DRAIN lt 7 e PROPER COIL CAUTION DO NOT kink or brimp the refrigerant lines DO NOT bend the excess refrigerantlines ina vertical loop s which allow trapping of refrigerant in LOW sections during OFF time Bend and shape the excess refrigerant lines in VERTICAL spirals not HORIZONTAL spirals See Figure above Page 9 FINAL CHECK LIST 1 15 the Cabinet level IMPORTANT 2 Have all electrical and piping connections been made 3 5 there an electrical service disconnect within sight of the installed machine Hasthe voltage been tested and checked against the nameplate rating 4 Isthewater supply line shutoff valve installed near the machine 5 Have all the wires been checked for looseness and thightness 6 Have Compressor hold down nuts been checked to be sure the Compressor is snug on the mounting pads 7 Hastheowner use
42. utput shaft with double keys is fitted in the gear box bore and connected to the auger shaft via aluminium casting coupling The Bin Thermostat Ranco K50 P1135 must have its sensing capillary extended into ice room ina way thatit could be contacted by the ice when storage ice room becomes filled Itterminates ice production when its capillary gets in contact with ice It is wired in series with all other controls It is factory setto cut out at 1 5 C and cut in at 4 C The Condenser Water Cooled is tube within a tube with end plate manifold to permit cleaning of water tube Its heat rejection is of 12 000 Kcal hr The Condenser Water Valve PENN 1 2 Bellow type Regulated water flow through the condenser to maintain constant head pressure at 17 atm 240 psi The Drier Filter is Castel 4316 4 of cm 250 capacity with flare fitting of 1 2 to dehydratate moisture in the system The Expansion Valve is FLICA mod AMVX 3 Press 3 bar Office 4 5 m m for R 404 A meters the refrigerant R 40A 4 to the evaporator serpentine at 1 9 bar 27 psi The Main Contactor with 5 N O contacts at 380V 25 A Kw 12 5 at 220 V 40 amp Kw 11 The Timer optional this timer has three functions STOP CONTINUOUS and TIME CLOCK from 0 to 24 hrs It will be mainly used to pre set the system operation time in relation to the desired amound of ice The timer box can be remotely located from the machine in a convenient and accessible position
43. why If the stoppage is caused by its refrigerant pressures or overloading in the drive train mechanism a warning light glows the cause of the stoppage should be diagnosed and corrected before reoperating the ice makers corrected before reoperating the ice makers stoppage and also the reason why The warning light signals low or interrupted water supply This light and its internal control are on an automatic reset device whereby the icemaker will automatically start up and the red light goes off when water pressure reaches 1 2 atm 16 Psi or more Two other lights signal respectively Compressor Motor Overload and Bin Thermostat cut out situation Both these controls are automatic Besides the compressor that has important function to provide refrigerant to the evaporator to form ice in the MF 82 flaker there are the following components that worth to be mentioned The Drive Motor Coel mod F80B4 0 75 Kw Volts 230 380 Ph 3 Hz 50 Amps 2 9 1 7 RPM 1410 thermally protected Provides power through speed reducer to turn auger Page 16 The Condenser Fan Motor on Air Cooled Mod only 4 X unit Elco mod 3RGH 70 30 1 Watts 70 amps 0 7 Volts 220 Ph 1 Hz 50 RPM 1300 Thermally protected Capacitor uf 3 15 Volts 450 Fan 300 m mm h 1750 The Gear Reducer This gear reducer is securely bolted on the chassis base and supports the freezing cylindcer as well On its input shaft there is fitted the drive motor A separate o
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